Nikola Tesla (July 10, 1856 – January 7, 1943) signed typewritten letter cut. After emigrating to the U.S. in 1884, Tesla invented the induction coil or Tesla Coil a device essential to sending and receiving radio waves and one the U.S. Patent Tesla’s early experiments with radio began in the 1890s. They involved using what he dubbed a Tesla coil (something like those glass spheres you see at science museums that surge with purple bolts of plasma). In 1893, Tesla gave a private lecture describing his radio experiments in Philadelphia. Then, a few days later, he gave a public demonstration at the National Electric Light Association Convention in St. Louis. Tesla demonstrated that it was possible to send signals through space using a receiver. This item has been professionally custom matted and framed and comes with a Letter of Certification from Autograph Certification Experts.

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